Them that hate him; not only those who hate him directly and properly, (for so did few or none of the Israelites, to whom he here speaks,) but those who hate him by construction and consequence; those who hate and oppose his people, and word, and image, those who presumptuously and wilfully persist in the breach of God's commandments, as appears from Deuteronomy 7:9, where the love of God, to which this hatred is opposite, is described and expressed by the keeping of his commandments. To their face, i.e. openly, and so as they shall see it, and not be able to avoid it. He will not be slack, to wit, so as some men count slackness, 2 Peter 3:9, so as to delay it beyond the fit time or season for vengeance; yet withal he is long-suffering, and slow to anger, as that and other places inform us.
Related Commentaries of Deuteronomy 7:10
Deuteronomy 7:10
10 And repayeth them that hate him to their face, to destroy them: he will not be slack to him that hateth him, he will repay him to his face.